MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 211 



Marginiil vein longer tluiu the stignial. 

 Slaudlbles 3-(lentaie. 



First liagelhir joint scarcely longer tlian the third, the tliinl excised 



Maci:()TKI,kia Westw. 

 First llagellar joint much longer than the third. 



Eakyconus Forster. 



jMetascntcllum spined OnsTiiACANTiiA Ashm., gcu. uov. 



Metathorax with a large semicircular inclosed space at base. 

 Marginal veiu punctifonu; mandibles 3-dentate. 



CllHOMOTKLElA, gen. UOV. 



3. Metascutellum not spined. 



Marginal veiu pnnctit'orm or never as long as the stignial. 

 Mandibles 3-dentate. 



First flagellar joiut very long Caloteleia Westw. 



First flagellar joint shorter than second Cacus Riley. 



Marginal veiu loug, always longer than the stigmal. 



Mandibles 3-dcutatc Barycoxus Fiirster. 



Metascutellum spined. 

 Marginal vein longer than the stigmal ; mandibles 3-dentatc..LAPiTiiA, gen. uov. 

 Marginal vein shorter than the stigmal ; mandibles 2-dentate. 



Opistiiacantha Ashm., gen. nov. 



4. Mesonotum with three distinct furrows. 



Metascutellum armed with 2 teeth; tip of abdomen ending iu two short prongs. 



HoPLOTELEiAAshm., gen. uov. 

 Mesonotum with two furrows. 



Metathorax unarmed ; mandibles 3-dcntate (Macroteleia). 



Metathorax with 2 small teeth ; uuxndibles 2-dentate (Cacus Riley). 



Mesonotum without furrows. 



Metascutellum with a small acute spine Opisthacantiia Ashm., gen. nov. 



Metascutellum simple. 

 Metauotum with 2 small teeth at apex. 



Mandibles 2-dentate Cacus. 



Metauotum unarmed, simple. 

 Abdominal segments strongly constricted. 



Antenuje subclavate Cremastob.eus, gen. nov. 



Abdominal segments nomuil. 

 Autennie filiform, subnu)niliform Haduonotus Forster. 



5. Submargiual vein not reaching the costa, kuobbed B.eoneura Forst. 



. Submargiual vein reaching the costa. 



Submargiual vein uot terminating in a stigma. 

 Marginal vein very short, the postmarginal scarcely developed or shorter 

 than the stigmal. 



Mesonotum with 2 ftirrows Iduis Forster. 



Subnuirginal veiu termiuatiug iu a thickened stigma. 

 Head without a frontal ledgfe or lamina; postmarginal vein not developed. 6 

 Head with a frontal lamina or ledge. 

 Scutellum (j[uadrate, the angles acute; the postscutellum sjiiued. 



AcANTHOSCELio, geu. nov. 

 Scutellum and iiostscut.-'llum normal Spahasion Juriue. 



6. Mesonotum with 2 furrows. 



Maxillary palpi long, 5-jointed; antenna' long, setaceous, 12-jointed. 



Sceliomorpha, gen. nov. 

 Mesonotum without furrows, or rarely distinct. 

 Maxillary palpi short, 3-jointed; antenn;e short, fusiform, 10-jointed. 



Scelio Latreille. 



